The Kohler XTX650 is a 149 cc (9.1 cu·in) natural aspirated single-cylinder four-stroke air-cooled internal combustion small gasoline engine from the XTX-series with a vertical shaft, manufactured by Kohler Co for general-purpose applications, such as log splitter, pressure washer, tiller, walk-behind mower, yard vacuum.
The cylinder bore and the piston stroke are 65.0 (2.60) and 45.0 mm (1.80 in), respectively. Compression ratio rating is 9.2:1.
The Kohler XTX650 engine produces 8.8 Nm (0.9 kg·m; 6.49 ft·lb) at 2,800 rpm of maximum torque.
The Kohler XTX650 features:
- OHV design
- Aluminum cylinder block
- Cast iron cylinder liners
- Dependable electronic magneto ignition system
- Carburetor with fixed main jet
- Mechanical centrifugal governor
- Spalsh type lubrication
- Forced air cooling system
- Recoil starter
General information
Engine Specifications | |
Engine model | XTX650 |
Engine type | 4-stroke, OHV, single-cylinder |
Displacement | 149 cm 3 (9.1 cu-in) |
Max. horsepower | – |
Max. torque | 8.8 Nm (0.9 kg·m; 6.49 ft·lb) at 2,800 rpm |
Cooling system | Forced air |
Air cleaner | Replaceable, paper element |
Lubricating system | Splash type |
Ignition system | Dependable electronic magneto |
Fuel system | Carburetor with fixed main jet |
Fuel used | Unleaded gasoline (octane number 86 or higher) |
Fuel tank capacity | 1.1 liters (1.2 US.qts, 0.97 Imp. qts) |
Starting system | Recoil starter |
Governor | Mechanical centrifugal governor |
PTO shaft rotation | Counterclockwise (from PTO shaft side) |
Dimensions (L x W X H) | 366 x 356 x 267 mm (14.4 x 14.0 x 10.5 in) |
Dry weight | 11.5 kg (25.3 lbs) |
Cylinder Block and Head
Cylinder block | |
Compression ratio: | 9.2:1 |
Cylinder bore: | 65.0 mm (2.60 in) |
Piston stroke: | 45.0 mm (1.80 in) |
Cylinder internal diameter (standard): | 65.000-65.020 mm (2.5590-2.5600 in) |
Number of piston rings (compression / oil): | 2/1 |
Piston pin diameter: | 12.990-12.996 mm (0.5114-0.5116 in) |
Thrust face outer diameter (standard): | 64.975-64.985 mm (0.2558-0.2558 in) |
Ring-to-groove side clearance (Top): | 0.010-0.020 mm (0.0004-0.0008 in) |
Ring-to-groove side clearance (Second): | 0.010-0.020 mm (0.0004-0.0008 in) |
Ring end gap (Top): | 0.100-0.250 mm (0.0039-0.0098 in) |
Ring end gap (Second): | 0.610-0.760 mm (0.0240-0.0299 in) |
Number of main bearings: | 2 |
Crankshaft main journal diameter: | Flywheel: 25.005-25.019 mm (0.9844-0.9850 in) PTO: 26.950-26.970 mm (1.0610-1.0620 in) |
Crankpin journal diameter: | 25.985-25.995 mm (1.0230-1.0234 in) |
Cylinder head | |
Valve arrangement: | OHV, gear driven |
Valves: | 2 (4 valves in total) |
Valve head diameter (INTAKE): | 25.875-26.125 mm (1.0187-1.0285 in) |
Valve head diameter (EXHAUST): | 23.875-24.125 mm (0.9399-0.9498 in) |
Valve seat angle (INTAKE): | 44.5° |
Valve seat angle (EXHAUST): | 44.5° |
Valve seat angle (INTAKE): | 45° |
Valve seat angle (EXHAUST): | 45° |
Valve steam diameter (INTAKE): | 5.465-5.480 mm (0.2152-0.2157 in) |
Valve steam diameter (EXHAUST): | 5.465-5.480 mm (0.2152-0.2157 in) |
Tightening torque specs
Tightening torque specs | |
Connecting rod | 12.5 Nm (1.3 kgf·m; 9.2 ft·lb) |
Cylinder head (torque in 2 increments) | Step 1: 14.0 Nm (1.4 kgf·m; 10.3 ft·lb) Step 2: 27.8 Nm (2.8 kgf·m; 20.5 ft·lb) |
Rocker arm stud | 13.6 Nm (1.4 kgf·m; 10.0 ft·lb) |
Rocker arm pivot jam nut | 9.5 Nm (1.0 kgf·m; 7.0 ft·lb) |
Flywheel | 51.5 Nm (5.3 kgf·m; 38 ft·lb) |
Muffler | Exhaust stud: 5.0 Nm (0.5 kgf·m; 3.7 ft·lb) Exhaust nut: 9.5 Nm (1.0 kgf·m; 7.0 ft·lb) |
Spark plug | 27.0 Nm (2.75 kg·m; 20.0 ft·lb) |
Oil drain plug | 13.6 Nm (1.4 kgf·m; 10.0 ft·lb) |
Service Data
Valve clearance | |
Intake/Exhaust: | 0.0762-0.1270 mm (0.0030-0.0050 in) |
Oil system | |
Lubrication system: | Splash type |
Oil type: | API SJ or higher |
Recommended oil: | SAE 10W-30 |
Oil capacity: | 0.6 liters (0.63 US.qts, 0.53 Imp. qts) |
Fuel system | |
Type: | Carburetor with fixed main jet |
Fuel filter: | In-line fuel filter |
Ignition system | |
Type: | Dependable electronic magneto |
Spark plug: | Kohler 1413214-S |
Spark plug gap: | 0.76 mm (0.030 in) |
Ignition coil air gap | 0.254 mm (0.010 in) |
References
1. Kohler XTX Series XTX650, XTX675, XTX775 service manual. Kohler Co. 2021.
We try to use official documentation and verify the published data, but errors may occur. In addition, specifications of machinery and equipment may vary depending on markets and modifications. We do not recommend the use of this data for spare parts or repairs. Use official service manuals or parts catalogs for your product.
Be the first to comment